1.
For the function f(x)={1x2+(x+2)(12)x2,x2k,x=2f(x) = \begin{cases} \dfrac{1}{x-2} + (x+2)\left(\dfrac{1}{2}\right)^{x-2}, & x \neq 2 \\[8pt] k, & x = 2 \end{cases}, which of the following holds?